Figure 6.
Composition changes of bitumen from BD-UL and BD-BL. (a) Infrared spectra; (b) quantitative analysis diagram.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.